简明英汉词典

 light-year
n.
光年

美国传统词典[双解]

 light-year
light-year 也作 light year
AHD:[lot“y?r”]
D.J.[6lait7ji*]
K.K.[6la!t7j!r]
n.（名词）

(1)

 The distance that light travels in a vacuum in one year, approximately 9.46 trillion (9.46 × 1012) kilometers or 5.88 trillion (5.88 × 10 12) miles.
光年：一束光在真空里传播的距离，约9.64万亿（9.46×1012)公里或5.88万亿(5.88× 12)英里

(2)

 Often light-years Informal A long way:
常作 light-years 【非正式用语】 很长的路：
a small town light-years away from the action of the capital.
远离首都喧嚣的小镇

美国传统词典

 light-year
light-year also light year
AHD:[lot“y?r”]
D.J.[6lait7ji*]
K.K.[6la!t7j!r]
n.

(1)

 The distance that light travels in a vacuum in one year, approximately 9.46 trillion (9.46 × 1012) kilometers or 5.88 trillion (5.88 × 10 12) miles.

(2)

 Often light-years Informal A long way:
a small town light-years away from the action of the capital.

英汉航空大词典

 light-year
n.光年